How can a module be imported in Python?

In Python, importing a module allows you to access the functionalities defined in that module. The correct method for doing this is through the use of the 'import' statement. When you use 'import module_name,' you are essentially making the entire module available in your current script, which allows you to utilize all the functions, classes, and variables defined within that module.

This approach is key to maintaining modularity in your code, as it enables you to break your program into smaller, manageable pieces that can be developed and tested independently. By following this structure, you can also promote code reuse and improve readability.

Other options, such as using 'include' or 'use,' are not valid in Python and pertain to other programming languages like PHP or Perl. Simply declaring a module at the beginning of the file does not import it; it's the 'import' statement that actually brings the module into the current namespace. Thus, the 'import' statement is fundamental for utilizing external Python modules efficiently.